Find the realmlist.wtf file in your downloaded game folder (usually in the Data/enUS or Data/ruRU folder).
: Register on the server's official website. Important: Never use the same password you use for official Blizzard accounts. Change the Realmlist :
: Research popular servers like Warmane or Turtle WoW.
If you want to play alone or with friends on your own machine, you need "repack" software. How do I choose and join a private server? : r/wowservers